Establish a correct master-slave relationship between
www/linux-mozillafirebird and the ports that inherit most of their
information (except, e.g., distinfo) from it.
These changes should be transparent to installs (tested and verified
locally).
While here, update two cases of stale distfile info. (MD5s
verified versus mozilla.org.)
PR: ports/67701
Approved by: maintainer timeout (2 weeks)